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You Know, Doc, I Have This Thing lIYou Know, Doc, I Have This Thing" OU know, doc, I have this thing ..." Y No matter where I go-a party, a social function, a business meeting-I am invariably offered the opportu­ nity, once my profession becomes known, to examine and comment on a range of skin "things" that friends, col­ leagues, and acquaintances have become concerned about. Typically, interest in particular skin lesions follows on the heels of a news story about a famous individual who has been diagnosed with melanoma or the knowledge that a family member has had "something" removed. Alterna­ tively, concern about skin things relates more than ever to a preoccupation with the signs of aging. In a social setting, it has been my personal policy not to be offended by indi­ viduals seeking reassurance that their "things" are not seri­ ous. At least twice, people I met outside of my office showed me lesions that proved to require prompt attention. That they felt comfortable enough to raise the question may have been lifesaving. Nonetheless, it is true that the vast majority of lumps, bumps, and spots that we all have (and continue to accrue as time passes) are not malignant and bear no risk of cancer. However, they serve an important medical pur­ pose: they often bring people in to see the dermatologist, who then has an opportunity, through a full-body skin exam, to identify whether more serious conditions exist. © Copyright 2000, David J. Leffell. MD. All rights reserved. 16 The Basics In this chapter, I will describe the most common spots, the lesions that individuals bare in the host's kitchen, the restaurant's bathroom, or even in a corner of the hotel's meeting hall. Full-color examples of many of these are provided in the "Color Atlas of Your Skin" (see insert). The best way to think about any spots you may have is to identify the color. Does the color disappear when you put pressure on it? Is it a single spot, or are there many others just like it in the same area or elsewhere? Do the spots occur only where the skin is exposed to the sun? How long has the lesion been there? Did it occur within the past 24 hours or has it been present for the past several weeks or months? • BROWN SPOTS Spots that are brown have pigment in them. The brown coloration is caused by the pigment-producing melanocyte cell, or it can be the result of pigmentation from previous injury or even a side effect of certain med­ ications. Blue spots may also result from the presence of pigmentation in the skin, but the pigmentation is deposited deeper, in the dermis, so as light reflects off it in a process called the Tyndall effect the growth appears blue rather than brown. Brown spots on sun-exposed areas can be one of several things: so-called liver spots, which are due to chronic sun exposure; freckles; melasma, which appears as patches of pigmentation as seen in the mask of pregnancy; or lentigo maligna, a condition that requires serious attention because of the risk that it could turn into invasive melanoma. Solar lentigo, also called liver spot or sun spot, generally occurs on the face and the backs of the hands. It can occur in men and women and begin in middle age, occurring mostly in fair-skinned individuals of northern European descent. Freckles are often present throughout life and are manifested by numerous small brown non-scaly spots that become darker with sun expo­ sure. They begin in childhood and are most common in fair-skinned chil­ dren with blond or red hair and blue or green eyes. The tendency to get freckles is probably inherited. Of all the brown spots that can develop on the face with age, the one that is most alarming is lentigo maligna. This type of flat, dark patch is often present for many years; it may have variation in pigmentation including brown, blue, black, and sometimes red. The edges of the patch are frequently irregular and maplike. © Copyright 2000, David J. Leffell. MD. All rights reserved. "You Know, Doc, I Have This Thing" 17 Lentigo maligna occurs in sun-exposed areas, most often on the face and neck. Although it is usually seen in older, fair-skinned individuals, recently it has become clear that there has been an increase in this condi­ tion in younger individuals, even in their forties. Over many years lentigo maligna can transform into invasive melanoma, and for this reason it should be approached aggressively. Melasma is a blotchy tan discoloration that affects the cheeks, pri­ marily under the eyes and cheekbones. It can affect the chin and upper lip as well, but is usually not seen on the backs of the hands or the chest. Melasma is very common in women who have been pregnant. In fact, it usually appears first during pregnancy, when it is known as chloasma or the mask oj pregnancy. Melasma can be exacerbated by taking oral con­ traceptives. All this tells us that the pigmentation in some way is related to estrogen, but we are not certain about what that mechanism is since melasma is occasionally seen in men too. The treatment options for this condition are relatively limited, which makes melasma a frustrating condi­ tion to dermatologists. We have tried using laser, chemical peel, and bleach­ ing creams, and the best thing that can be said is that treatment must be customized to the individual. This condition is not in any way dangerous. Another common pigmented patch is the cafe-au-lait spot. These smooth, benign, uniformly pigmented, tan patches are usually larger than half an inch. Although they occur most frequently on the trunk, they can be seen anywhere on the body. About 10 percent of all people have one to three spots like this. Rarely, cafe-au-lait spots are a sign of an inherited condition. Albright's syndrome, which includes premature puberty and bone abnormalities, can have a cafe-au-lait spot as a skin sign. Neurofibro­ matosis, a condition incorrectly thought to be "elephant man disease" may also be associated with multiple cafe-au-lait spots. In this condition, spots are only a small part of a syndrome that includes multiple fleshy nodules or fibromas over the whole body. Sometimes pigmentation changes arise after an inflammatory event has taken place. Inflammation is simply the process by which the body tries to fix a problem. For example, if you scratch yourself, your body immedi­ ately senses that something has gone wrong and sends cells into the area that release chemicals, which set about fixing the problem and restoring the skin to its normal state. In doing so, there is redness, the result of the ingrowth of new blood vessels and release of compounds that assist in ward­ ing off any infection, which might now take advantage of the break in the skin. Under normal circumstances the body goes about its business and cor- © Copyright 2000, David J. Leffell. MD. All rights reserved. 18 The Basics rects the problem. What is often left is something called postinflammatory hyperpigmentation, in which the pigment melanin has been deposited in the dermis. This will take time to resolve, but is otherwise not a problem. When pigmented spots occur in areas that are not sun-exposed, we usually think of less serious conditions, such as a fungal infection, benign moles, or congenital nevi (the moles with which we are born). Any new or changing brown spot on the palms or soles should be investigated immedi­ ately because of the possibility of melanoma. Your dermatologist will be able to determine if there is any reason for concern. Another common complaint is a black nail. People often think that this represents a melanoma, and indeed it can. More often, however, it is so­ called talon noir, which is the result of a stubbed toe or other trauma. The bruise or hemorrhage under the nail can look just like melanoma. Pigmentation can color the skin more broadly than just in particular spots. When hyperpigmentation occurs over the whole body, it can be an indication of an internal problem. For instance, Addison's disease, the condition that afflicted President John F. Kennedy, can cause generalized darkening of the skin. This is due to failure of the adrenal glands, which sit on the top of the kidneys, to function properly. Another internal condition with brown skin discoloration is arsenic poisoning. The accidental inges­ tion of arsenic was far more common when the chemical was used as an insecticide on farms and elsewhere. While internal cancer could develop as a result of this poisoning, it was the outward manifestation-rough pits on the palms and the development of skin cancers-that often signaled that something was wrong. A few more conditions merit a brief mention. Cushing's syndrome, in which the adrenal gland produces excessive amounts of cortisol, can man­ ifest itself with facial hair, new outbreak of acne, black-and-blue marks, and stretch marks. A rare blood condition called hemochromatosis can result in bronzing of the skin, hair loss, and spoonlike changes in the nails. • LIGHT SPOTS AND WHITE SPOTS On the other end of the color spectrum are spots that lack pigmenta­ tion completely or are lighter than the surrounding skin. So-called depig­ mented areas can be indicative of a condition called vitiligo, which has been made most famous by Michael Jackson. Hypopigmented macules are spots that have decreased pigmentation and could represent a superficial fungus infection called tinea versicolor or some other disease.
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